Re: [Discuss-gnuradio] interpolation and output level + missing Tx_check

[Javs]

Greetings,

I updated my code from CVS yesterday and the
tx_check.py was missing in the gnuradio-examples. Was
this removed ? 

I am still wresting with the issues below. This time I
tried usrp_siggen.py and it fails the first time
giving: 

address@hidden usrp]$ ./usrp_siggen.py
usrp: found usrp rev2
usrp_open_interface: usb_claim_interface: failed conf
0
could not set config 1: Operation not permitted
open_nth_cmd_interface: open_cmd_interface failed
Traceback (most recent call last):
  File "./usrp_siggen.py", line 144, in ?
    main ()
  File "./usrp_siggen.py", line 128, in main
    sg = siggen ()
  File "./usrp_siggen.py", line 21, in __init__
    self._instantiate_blocks ()
  File "./usrp_siggen.py", line 68, in
_instantiate_blocks
    self.usrp = usrp.sink_c (0, self.interp)
  File
"/usr/local/lib/python2.3/site-packages/gnuradio/usrp1.py",
line 740, in sink_c
    return _usrp1.sink_c(*args)
RuntimeError: std::runtime_error

-------------------

Any suggestions ? 

Thanks in advance.

Javs

--- Javs <address@hidden> wrote:
> Hey Eric,
> 
> I tried various values for the amplitude and looks
> like  it works fine anywhere between 10000 and
> 35000,
> giving me ~= 10mV and 35mV respectively. But
> anywhere
> below or beyond its behaving erratic. Is this the
> boundary ?
> 
> And here is what I get when I boot my usrp and run
> the
> tx_check.py the first time.
> 
> address@hidden usrp]$ ./tx_check.py usrp: found usrp
> rev2
> usrp_open_interface: usb_claim_interface: failed
> conf
> 0
> could not set config 1: Operation not permitted
> open_nth_cmd_interface: open_cmd_interface failed
> Traceback (most recent call last):
>   File "./tx_check.py", line 78, in ?
>     main ()
>   File "./tx_check.py", line 70, in main
>     sg = siggen ()
>   File "./tx_check.py", line 17, in __init__
>     self._instantiate_blocks ()
>   File "./tx_check.py", line 53, in
> _instantiate_blocks
>     self.usrp = usrp.sink_c (0, self.interp)
>   File
>
"/usr/local/lib/python2.3/site-packages/gnuradio/usrp1.py",
> line 692, in sink_c
>     return _usrp1.sink_c(*args)
> RuntimeError: std::runtime_error
> 
> ---------
> 
> Thanks for looking into it.
> 
> Javs
> 
> --- Eric Blossom <address@hidden> wrote:
> > On Fri, Mar 18, 2005 at 02:05:24PM -0800, Javs
> > wrote:
> > >  
> > > Hello ppl, 
> > >  
> > 
> > > I understand that the interpolation factor
> changes
> > the amplitudes of
> > > the signals. The default usrp_siggen.py works
> fine
> > and I can admire
> > > 16mV and 100 K on the scope. But if I use the
> > default intrp of 64 in
> > > the example usrp_siggen.py and try to change the
> > amplitude levels
> > > using -a option, the signals still come down.
> Any
> > guesses why ?
> > 
> > What value's are you trying with the -a option?
> > Keep them <= 16000.
> > 
> > > Also, When I first boot my USRP and try an
> > example, it fails for the
> > > first time. For instance, I tried tx_check.py
> and
> > i had a runtime
> > > error. However, it works fine the second time.
> Is
> > this because, it
> > > takes its time to load firmware into the FX2 and
> > the FPGA or am I
> > > missing something here ?
> > 
> > What's the error?
> >   
> > Eric
> > 
> 
> __________________________________________________
> Do You Yahoo!?
> Tired of spam?  Yahoo! Mail has the best spam
> protection around 
> http://mail.yahoo.com 
> 
> 
> _______________________________________________
> Discuss-gnuradio mailing list
> address@hidden
>
http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
> 

__________________________________________________
Do You Yahoo!?
Tired of spam?  Yahoo! Mail has the best spam protection around 
http://mail.yahoo.com